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vibhav
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At a certain resort, each of the 39 food service employees 26 May 2012, 22:27
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45% (medium)

Question Stats:

69% (01:59) correct 31% (02:11) wrong based on 687 sessions

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At a certain resort, each of the 39 food service employees is trained to work in a minimum of 1 restaurant and a maximum of 3 restaurants. The 3 restaurants are the family buffet, the dining room, and the snack bar. Exactly 19 employees are trained to work in the family buffet, 18 are trained to work in the dining room, and 12 are trained to work in the snack bar. If 4 employees are trained to work in exactly 2 restaurants, how many employees are trained to work in all 3 restaurants?

A. 2
B. 3
C. 4
D. 5
E. 6
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B
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Bunuel
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At a certain resort, each of the 39 food service employees 11 Jul 2012, 02:10
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vibhav
At a certain resort, each of the 39 food service employees is trained to work in a minimum of 1 restaurant and a maximum of 3 restaurants. The 3 restaurants are the family buffet, the dining room, and the snack bar. Exactly 19 employees are trained to work in the family buffet, 18 are trained to work in the dining room, and 12 are trained to work in the snack bar. If 4 employees are trained to work in exactly 2 restaurants, how many employees are trained to work in all 3 restaurants?

A. 2
B. 3
C. 4
D. 5
E. 6
Show more


{Total} = {Buffet} + {Dinning room} + {Snack bar} - {Those who work in exactly 2 restaurants} - 2*{Those who work in exactly 3 restaurants} (explained here: formulae-for-3-overlapping-sets-69014.html#p729340);

39=19+18+12-4-2x --> x=3.

Answer: B.
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vibhav
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At a certain resort, each of the 39 food service employees 26 May 2012, 22:28
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have a look at this problem. See how quickly you can solve it. also post the time you took. Will post the OA soon.
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At a certain resort, each of the 39 food service employees 10 Jul 2012, 23:14
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vibhav
At a certain resort, each of the 39 food service employees is trained to work in a minimum of 1 restaurant and a maximum of 3 restaurants. The 3 restaurants are the family buffet, the dining room, and the snack bar. Exactly 19 employees are trained to work in the family buffet, 18 are trained to work in the dining room, and 12 are trained to work in the snack bar. If 4 employees are trained to work in exactly 2 restaurants, how many employees are trained to work in all 3 restaurants?

A. 2
B. 3
C. 4
D. 5
E. 6
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39 = 19 + 18 + 12 - 4 - 2x
2x = 19 + 18 + 12 - 4 - 39
= 45 - 39
= 6

x = 3

Less than a minute i guess
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At a certain resort, each of the 39 food service employees 26 Sep 2013, 01:11
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vibhav
At a certain resort, each of the 39 food service employees is trained to work in a minimum of 1 restaurant and a maximum of 3 restaurants. The 3 restaurants are the family buffet, the dining room, and the snack bar. Exactly 19 employees are trained to work in the family buffet, 18 are trained to work in the dining room, and 12 are trained to work in the snack bar. If 4 employees are trained to work in exactly 2 restaurants, how many employees are trained to work in all 3 restaurants?

A. 2
B. 3
C. 4
D. 5
E. 6


{Total} = {Buffet} + {Dinning room} + {Snack bar} - {Those who work in exactly 2 restaurants} - 2*{Those who work in exactly 3 restaurants} (explained here: ;

39=19+18+12-4-2x --> x=3.

Answer: B.
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Thanks for the formula and link!
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At a certain resort, each of the 39 food service employees 17 Jun 2014, 16:38
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Hi Bunuel,

I have a dbt regarding this formula.As in this question it is explicitly mentioned that "exactly" 19 employees are trained to work in the family buffet, While 18 are trained to work in the dining room, and 12 are trained to work in the snack bar. So how can we add these 3 values as it is in the formula.I mean 18 and 12 would constitute of some commom values also while 19 wont.
Please help me understand.
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At a certain resort, each of the 39 food service employees 17 Jun 2014, 16:40
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maggie27
Hi Bunuel,

I have a dbt regarding this formula.As in this question it is explicitly mentioned that "exactly" 19 employees are trained to work in the family buffet, While 18 are trained to work in the dining room, and 12 are trained to work in the snack bar. So how can we add these 3 values as it is in the formula.I mean 18 and 12 would constitute of some commom values also while 19 wont.
Please help me understand.
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Have you check this post?
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PareshGmat
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At a certain resort, each of the 39 food service employees 19 Jun 2014, 03:22
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Solved using Venn Diagram. Please refer below:

39 = 19 + 12-(b+c+x) + c + 18-(a+c+x)

a+b+c + 2x = 49 - 39

2x = 6

x = 3

Answer = B
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exc4libur
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At a certain resort, each of the 39 food service employees 30 Apr 2017, 16:26
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vibhav
At a certain resort, each of the 39 food service employees is trained to work in a minimum of 1 restaurant and a maximum of 3 restaurants. The 3 restaurants are the family buffet, the dining room, and the snack bar. Exactly 19 employees are trained to work in the family buffet, 18 are trained to work in the dining room, and 12 are trained to work in the snack bar. If 4 employees are trained to work in exactly 2 restaurants, how many employees are trained to work in all 3 restaurants?

A. 2
B. 3
C. 4
D. 5
E. 6
Show more

Equations:
a + b + c = 39 [total people working per restaurants]
a + 2b + 3c = 49 [total people working one or more restaurants]

Substitute "b" = 4:
a + c = 39 - 4 = 35
a + 3c = 49 - 8 = 41

Solve System "subtract to find c = people working in all 3 restaurants":
2c = 41 - 35 = 6
c = 3
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At a certain resort, each of the 39 food service employees 22 Dec 2024, 22:47
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